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Sudden death of HP33S batteries - Printable Version

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Sudden death of HP33S batteries - Dave Shaffer (Arizona) - 03-12-2008

I don't recall whether this has come up before.

A week or two ago, when I was using my '33S, I got a low battery warning but everything still worked. I then turned it off (I'm pretty sure).

Two days ago, when I went to turn it back on, I got absolutely no indication that it was alive. Fortunately, nothing of much value was stored.

Today I measured the battery voltages - they were about as low as I've ever seen for batteries! Less than 0.1 V for either, no load. I'm rather surprised that the calculator in the OFF state could pull them so low. I wonder if something might have failed internally. I don't have new ones to put in yet to check that possibility. That's tomorrow's task.

So, a warning: if your '33S indicates low batteries, you better change them right away if you want to retain your work.


Re: Sudden death of HP33S batteries - Trent Moseley - 03-12-2008

As I discussed some months ago with Luiz, my HP33S batts went completely dead with no warning indicator.

tm